Fastening inserting machine



Feb- 5, 1952 c. D. KNowL'roN 2,584,273

y FASTENING INSERTING MACHINE Filed sept. 21. 1948 5 sheets-sheet 1 c.- D KNowLToN FAsTENING INSERTING MACHINE Feb. 5, 1952 Filed Sept. 21, 1948 5 Sheets-Sheet 2 Feb. 5, 1952 c. D. KNowLToN 2,584,273

- FASTENING INSERTI'NG MACHINE Filed Sept'. -2]., 1948 5 Sheets-Sheet 5 C. D. KNbwL'roN FASTENING INSERTING MACHINE Feb. 5, 1952 5 Sheets-Sheet 4 Filed Sept. 21V, 1948 Feb- 5, 1952 c. D. KNowL'roN FASTENING INSERTING MACHINE 5 'sheets-shea 5 Filed Sept. 2l, 1948 his/jy Patented Feb. 5, 1.952

FASTENING INSERTING MACHINE Cutler D. Knowlton, Rockport, Mass., assignor to United Shoe Machinery Corporation, Fleinngton, N. J., a corporation of New Jersey Application September 21, 1948, Serial No. 50,255

l 'l Claims. 4 Y l` vThis invention relates to fastening inserting machines, and is particularly concerned with yimprovements in. fastening inserting machines of the type in which a strand of fastening material, such as a metal wire, is inserted into the rwork parts to be united, whereupon a fastening is formed from the inserted leading end portion of the strand. 1

It is an object of the invention generally to improve upon -machines of the above-described type and more specically to provide an improved fastening inserting Vmachine of the abovementioned type which is adapted to insert a fastening into the work parts inv such a manner thatk the fastening does not penetrate the full thickness of the combined work parts but becomes anchored within these parts.

vIn accordance with a feature of the invention the illustrated machine, is provided with a reciprocating, positively acting Wire clamp which, during its active stroke, holds the wire rmly gripped and advances it a predetermined distance through and outof the machine, there being also `provided a deflector against which the positively fed wire is caused to impinge before entering the Work withthe result that the wire follows a curved path Within the work without penetrating entirely through the work.r A combined shearing, curling andclenching member which cooperates .with the delector .then is rendered active rst to shear off the inserted leading end portion of the wire strand a certain distance above the work while progressively forming a curled point and then to clench the trailing end of that portion over into Vthe work, thus forming a staple-like fastening, both ends of which are firmly lodged within the substance of the combined Work parts Yunited by the fastening.v f

These andotherfeatures of the invention will now be described in detail in connection with the accompanying .drawings and Iwill be pointed out inthe'appended claims..`v y p f In the drawings, y i V Fig. 1 is a view in right-,hand side elevation of the main operating instrumentalities, 4as well as their actuating members, of a fastening inserting machine in which the present invention is embodied, the parts being in the positions assumed prior tothe inflation of its operation;

Fig. 2 is afdetail view of a wire shearing, curl-V ing and clenching member in the position vit assumes after themcompletion of ,itsk operative stroke, a fastening having been formed and im yserted into the work; v

n' Fig. 3 is a view Yirniiar to Fig. 1 with into the work;

chine parts assuming their positions at thevcompletion of the Wire feeding stroke; 1

Fig. 4 is a front elevation of the main operating instrumentalities of the ymachine in the normal inoperative position, with certain parts removed or broken away;v 1 1 Fig. 5 is a front elevation of the parts'V shown in the lower portion ofFig. 4, with these .parts assuming their positions at the completion of Wire strand shearing; f

Fig. 6 is a sectional view in front elevation of a wire clamp which is part of the Wire feeding mechanism; J

Fig. 7 is a plan view of the wire feeding mechanism; g Fig. 8 is a plan view of the machine parts illustrated in Fig. 1;

Fig. 9 is a view of the inside faceof a side plate of the machine throat from which the wire passes Fig-10 is a rear elevation showing the position 'of the'wire deflecting pusher and the combined shearing, curling and clenching instrumentalities just prior to their operation upon the wire'strand;

Fig. l1 is a perspective'view on an enlarged scale of the wire deecting and combined shearing, curling andV clenching instrumentalities Yshowing the manner in which the wire is simultaneously sheared and curled; and -Y j Figs. 12, 13, 14 and 15 are left-hand side elevations, partly in cross section, each4 respectively showing the successive stages and -manner in which the protruding portion of the wire strand is progressively and'simultaneously sheared and curled,"then iinally clenched over and-downward into the work. a

' The illustrated fastening inserting machine, as stated above, is adapted to inserta wire strand into work parts to4 be united-and to cause the wire strand to foll'owa curved pathwithin the Work parts without penetratingtheirfull thickness, then to 'sever the inserted'leading. v end portion from the 'strand atA a4 distance-abov'e-the kwork while simultaneously forming adownwardly the machine, 'the'overlasted marginal portionof :a shoe upper B-to an insole C. The-wirestrand vwhich the; fastening A is f'ormedis indicated atl) in Figs;x1,3 to 7, and 9 toll. :Ths'wire strand-'is preferably coiled up'k on a reel;` (not shown) which, asA usual, is rotatably .rnountedjon the machineand from whichthe wire. strand-.D

is-guided into and through the machine to be n processed in the manner described. Preferably A-wire1-intake mem`ber `36 flFigs. 1, V3 and '8) in thefform of asblockis secured on `.top of the block Handheld lwithin a rabbetedrecess inthe block 24:' This Ywir-e intake-member 36-contains a con-V ventional wire brake Vvdesigned* to `prevent retro-i grade movement ofthe w-ire strand D.

'I'hefy above-mentionedv Wire guiding passage provided* between the' bars |42 and? I6y is continued below the 'blocks-'2ll1-and 126;V as willbe r`described;E The-block2ll has iintegral therewith a lowerrbar-like @extension 38 '(Fi`g's. 1,'1 3i and-'4) andesecuredfto that `exten-sion 38 is la vmain throat block 40.v The -blockv40 is of rectangularlcrosssezitioir and its narrow-V sides= are vfacing front as seen from the front of the machine, is plane or-smooth'and attached-toit by-screws isa de- `ileetoirplate 42 v (Fig-4) `V.which is 'detached `in Figs. land-i3 and is-separately' shown in Figs. 9'and 11.- A The inside face'or 'left-'hand' facesof the "detlector Aplate ./.142 kwas seen"-from :the front of the machine?" is #provided -with` anf insert member .44, 'the' f-exposed Y surface noiv which lies.A .in the same pianefas fthe-inside kface .of` the deiiector.. plate `42.-: The insertcmemberi isrslightly spacedV along:the right-'Jh'andedgethereof, Aas seen in Figs-:95am 11,. fromthe :adjacent portion 'of the deector i plate .42;` thus lforming. a .wire guiding passage@ 451s The /fuppery end'iofithe wire .guiding passage Sistina alinement with the s lower portion of, Vfthe wire .fguiding passage, provided` between the bars VI4 I6 .i The lower right-hand, portion-48' of the insert member-441is3roundedand the .adiacent portion oftthe :deector :plate 'is correspondingly rounded while :maintaining i the:

same spaced relation therewith, thus causing the wire guiding passage 46 to curve toward the left of Figs. 9 and 11. As the Wire leaves the throat it is caused to curve in a reverse direction by impingement upon a deiiector portion 50 of the insert member 44. The deflector portion 50 progressively curves the Wire as it is being fed out ofthevpassage '45, thus @causing githe leading end portion of the wire strand "toenter 'the Work in end portion of the wire strand to form the fasten 1o a curved pathwithout penetrating the full thicking A, as already indicated. Y f `ness of the work. The Work is being held against The main elements r meChIiiSmSet tl-ie-:maeA .theyflowerrfacesfof the .block 40 and the plate 42, chine Which have been just brieflif flfiOdilCed which two members constitute the throat of the are directly or indirectly supported vonIthefma machine. Y chine frame ID (Figs. 1, 4 and)whichpreierably i5' Fortherpurpose'of intermittently feeding the :gis a hollow head mounted on a'oolumn.' Atsege y-wirexstrand.through the machine there is pro- I2.Figs. l to 3) adjustably secured torthemachine vided'c-wire,feedingfmechanism comprising a verlame determines, by engagement With the Work, tically reciprocating wire clamp in the form of a the horizontal position ofthe manually supportedA chuck' which is adapted intermittently to engage work in the machine. the wire to grip it and then to move the wire Thef--aivireguideebrieysmentioned 1above.com downA while maintainingv its gripping; engageprises primarily ftWoibarS-Hlf l (Fie. .6) which .mentztherewi-th.. Th'echuck :isjillustratedribest areel'ieldr iii-mutual 'abutting position .and extend in the "sectionalviewffof. fliig.; 6,. 1i; vcomprsesitwo 'hghtWiSe 0f thel machine. 'Ihe-abutting'faces spaced'parallel 'sidelplates"52.'provided withior- Of-ltheebali Mea-'nd 5121 11111171861v 01111435' best 525 -WardIy and .rearwardly extending guide agnges shown in Fig. 7, to provide a gnidewaynofrec 54 (see Fig. 7). These guide v`ranges :engage and -tangular` cross-section adapted=to :.contain' and run. along `opposite side-'faces -of thebarsfzz 'gan-d `guide-'-the:wirestrand D.; 'Thetwo :bars I4, .1E 28, thereby guiding the entire chuck"during Aits VaIeLIIiGtl-nie@iin'an assembly COmpIising'vertiCally vertical reciprocation. The lower portions of spaced rear blocks I8, 20:(1iigsn1ande3), theft() the two sideplates 52 are connected togetherrby biockslbeingfconnected byfafbai' 22 T150 form an a spacing member or 'Web"156'which' is pinned'to integrar unit.- In abuttir-igl relation withi the both Yplates 52.I A top platets'is secured 'to the front faces of the blocks I8. 2B are-'.'Veltially top 'ofthe sideplates 52.1A There are provided @Medef-F0111? blOCkS#24#YZGaSOLCODneCed.b5 2i l two-.bores ifin'th'eweb" Y56 in which'areiseatbar 28 to form an integral unit. The abuttingr` 35- ed springs 62, Inside the casing 'made' up'lby V1913er*'blCiiSifand"24raSWell-as the abutting' the-side 'plates 52 and the Web'56v there are prolower blocks 20 and 26, are securedby screws, vided two opposite"wire1 gripping members 64 indicated-at I@fiend-'132iirrf-ivli'eS-1 l'andf'iito-a vlarge Awhich have wireengasing porticnsisthatare fron-trilate@311iv/hihin turn-isibolted to the v-shaped-in cross-section;- The portions Grof machine frame I0. 40 th'egripping member 641'are adapted toentervshaped recesses l58(Fig.v 7) provided in opposite faces of the bars |4, I6, thereby vengaging the vWire strand D'between them. The r`wire grippingA members 64 -which are engaged by the upisper Vends of the springs 62 are provided with inclined outer faces'l (Fig. 6) which are parall'elto inclined inner faces 12 lof wedge members '14. The faces 10'and '12 are 'spaced aparta predetermined distanceand` in this 'space are located balls 16. Integral with the outer sides of the Wedge members 14 vare pins 18 Whch'exte'nd n' through holes provided'in the side plates ,52 into pivot blocks 8G (Figs. 4- and '7). The `blocks 8U are-mounted in guideways 82 provided at the in'- Asidesiof 'the tines ofl the forked frontend 84 of the horizontal arm of a bell' crank. lever. .86 .(Figs.

' 1 and 3)'. The bell crank'lever fis'mounted yfor oscillating movementabout 'a'fixed Yshaft' 88 secured in the machine lframe IU.

It will be "noted that the springs'62 seated in the web 56 tend'to move fth'ewire gripping'm'ernbers 64 upwardlyto loosen their gripfon the wire strand D. Thus on upward swingingmovement of the just-mentioned horizontal arm-of the bell crank lever 86 lthe Atwo"grippinginiembers"$54, under theV influence ofthe 'springsr62,4 slide idly along the wire strand D until 'the horizontal arm of theK4 bell crank lever- 8'6 has reached the upper limit of its travel."v On downward movement r(counterclockwise in Fig. 1) of that arm-which is its operative stroke,-the wedge members" 14,

being vpositively connected to the bellcrank lever 86,` exert a strong wedging action on the wire r gripping members 64 displacing, them-laterally D toward the wire Dtwithlthe A'result "that these members firmly grip the wire between them. During and as a result of the downwardmovement of the entire:v chuck, they then advance the wire strand, the strand passing along the guideway provided between the bars |4 and y16, .i

as well as passing through the guideway 46 of the throat of the machine. Having reached the lower end of its operative stroke, vthe'horizontal arm of the bell crank lever 86 again begins its upward travel with the result that under the 84 again slip idly along the wire strand D preparatory to another wire feeding movement. Fig. 1 illustrates the bell crank lever 86 in its uppermost'position prior to the initiation of its oper- .the wire-guiding passage `46 of the throat member, is curved by the portion 48 of the insert member 44, then is caused to impinge upon the deectorportion 59 to be curved in the opposite direction and to enter the work in a curved path.

Since it is desirable to sever the wire strand by means moving in the direction of wire feed but intersecting the wire strand at an acute angle, the illustrated machine is provided with special means adapted to'bend the leading end portion of the wire strand contained in the lower end of the throat out of the forwardly and rearwardly extending vertical plane of 'its normal path of movement. Accordingly, the Awire strand may be sheared by a cut executed in a vertical plane, it being understood that the lateral bending or deflection of a portion of the wire strand causes that portion to intersect the vertical plane of the shearing cut. To this end `there is mounted in a recess 99 (Figs. 1 to 3) provided in the lower portion of the extension 38 of theVv block 29 a pusher 92. The pusher 92 is movable in the general direction of work feed, i. e. in the vplane of Fig. 4 and is secured on the downwardly curved arm of a small two-armed lever 94 which is mounted for pivotal movement ona pivot pin 96 secured in the extension 38. In its normal inoperative position illustrated in Fig. 4, the pusher 92 is located adjacent to, but out of contact with, the wire strand D and it is only on account of a rocking movement imparted to the lever 94 that the pusher 92 is caused to engage the wire strand D and to bend it across the vertical planeof the shearing cut. To operate the lever 94 and pusher 92 the left-handV end (as viewed in Fig. 4) of the lever 94 is pivotally connected by a ball-and-socket linkage 98 (Figs. 1, 3 and 4) to a two-armed lever |99 which is mounted for rocking movement upon a fixed shaft |92 secured in the machine frame.

The main throat block 49 is providedv with a recess |94 (Figs. 1 and 3) in which is mounted for rocking movement about a horizontal pivot pin |99 a combined wire shearing and curling member |98 (Figs. l to'4) the lower. edgerof which is the cutting edge. As already indicated, the member |98 is movable in a vertical plane, this movement taking place about the pivot pin |96 and during its downward strokethe shearing edge of lthe member is adapted to sever the leading end portion of the wire strandv from the strand while the flat bottom surface of the memportions downward andnally continued move- -action of the springs 62' the gripping members -bell crank lever. 88. -mounted on afixed shaft 46 secured in a bracket mentof the member clenches'the. curled trailing end,v of that portion which protrudes from the work, over and into'. the work thus forming the fastening A illustrated in Fig. 2. As graphically illustrated in Figs. l2 through 15, the shearing and curling of the vwire strand and the clenching of the fastening all take place in one continuous motion of the combined shearing, curling and clenching member |98. Inorder to actuate the shearing and clenching member |98, its right-hand end, as viewed in Figs. 1 and 3, is pivotally connected by means of a link ||9 to a two-armed lever ||2 mounted for rocking movement on the fixed shaft |92.

The driving mechanisms for actuating, in time relation, the above-described wire feeding mechanism, the pusher 92 and the shearing and clenching member |98, willnow be described. Referring first to the driving mechanism for operating the wire feeding mechanism, it is to be noted that this mechanism derives its power from a loaded torsion spring Y|-|4 (Figsl and 8) vwhich is mounted on a fixed shaft I9, the shaft to the machine frame |9 and located adjacent I to the rotatable disk |29. Adjustment of the disk |29 varies the tension of the spring 4. The other end of the spring ||4 abuts the rear face (right-hand face in Figs. l and 3) of the vertical arm of the bell crank lever 86. It will be noted, therefore, that the force of the loaded spring when permitted to act on the bell crank lever 89 swings the bell crank lever in a counterclockwise direction, as viewed in Fig. 1, to impart to the chuck a wire feeding motion.

To tension the spring H4 and to hold the bell crank lever 89 cockedv against the force of the tensioned spring I4, there is provided special mechanism, illustrated best in Figs. l and 3.

which will now be described. Secured in theV upper portion of the vertical arm of the bell crank lever 86 is a lateral pin |28 which extends into a slot |39V provided in the enlarged forward end portion of a rod |32.k The rod |32 is pivotally secured at its rear end by a pin |34 to a fork member |38 which is adapted to rock on a fixed shaft |38 secured in themachine frame. To rock `in Fig. 3 tensions the spring ||4 and cocks the bell crank lever 89, that is to say, swings the bell crank lever inl a clockwise direction back into its initial position, illustrated in Fig. 1. The spring I4 is held tensioned or loaded and the bell crank lever/86 is held cocked by a latch |44 which engages the upperend of the vertical arm of the The latch |44 is rotatably |48 of th'e'machine framev |9. A spring |59, one

end of which is mounted in a socket provided in the bracket |48 and the othervend of which is V mounted-Himanfalined socketprovided iin-fthe rtop fa'ce 'for fthe rlatclnLI 44,: 'tends -toaswing fthe latch intolits.;latching position; illustrated in* Fig., 1. The alatch' |44 has a tailpiece-|52'- which, atxa predetermined .point "during amachineicycle, is operated toA lift' the "latchiand rto f release `the '.bell crank lever v0b to the force of the. loaded :spring H45 To lift vthe latch '|44 there is'providedra latch; :tripping member: |54 securedfon the `rod |32.`` In the positiorn oi"` themachine parts, asilliisirrated in Fig.l1,it willbeseenthat on` movement-.ofthe rodl32 toward the left of jthat ligure the :tripping member I 54 is causedto-istrike against the tailpiece `|52 ftoswingthe latchx|44 ina niockwisedirection out of .engagement Vwith the- .bell crank', lever; thus .releasingv the bell crankfleverzto the forceof 'the-spring I|4 .and imparting a wirev feeding motion tothe chuck.. 1t will benoted alsolrthat on fmovement ofthe rod ISZLtOWar-dthe left of Fig. 1, there is a lost motion between the lateralpin |28 of the bell crank lever 86 fand the forward `end of the rod I321due to the provision of the slot |30 so that upon release of the bell'cranklever 85 it may be rapidly rotated by theloaded spring .I I4 with the lateral pin |22 traveling the length of the slot |30 .to-the forward vendthereoi, as shown in Fig. 3;v Return movement 'of therod |32 toward the right of Fig. 3 and from fthe positionillustrated therein again cocks the bell cranklever 86 and loads-the spring II4. At the same :time the trip member |54 is removed from-the tailpiece |52 ofthe latch |44 so that the latter, under Ithe influence of the spring I5, may

again' engage-the upper end of the vertical arm ofthefbellicrank'lever 85 'as soon as that arm arrives beneath'the hooked forward end of the latch It will be-noted in Figs'. 1 'and 3 that the bell crank lever VEdhasa rearwardly'iextending tailpiece |56 which; on rotation of the bell crank lever 08 fin laV counterolockwise direction bythe spring H4," is caused,'toward theend of that rotary motion of `the bell crankIle'ver 88, to strike against thetailpiece |58 of an arm |0 `pivotally secured on a shaft |62 Vmounted in the machine frame. The rearwardend of thearm I |50l is pivotally connectedto a link |04 which extends 'through a tailpiece |65 vof a llatch |68 similar to the latch .|44 and alsomounted adjacent to the latch |44 'to rock on the shaft |48. The link |64 is freely movable through an aperture in the tailpiece |66 and carries at its upper end a nut and a lock nut, the nut being normaily seated upon the toprface of the tailpiece |66. The latch |58 also is spring biased in the same way as the latch |44 and in its operative position the latch |60 holds cocked a two-armed leverV |10 which is mounted for rocking movement on the shaft 88.. The lower end of the downwardly extending arm of the lever |10 rcarries two rollers |12 .pivotally mountedon opposite sides thereof. One of the rollers |12 engages Va cam track |14 provided in the previously mentioned lever H10 vandthe other'roller. |12 engages a cam track I 16 providedV in the previously menticnedlever I I2. The two cam tracks |14 and |15 have different 'congurations with the re- `sult thatl on swinging movement of the lever |10 in avcounterclockwise direction (as seen in Fig. 1) movements are imparted to the levers and I I2 in a staggered time relation.

The .just-mentioned swinging movement of the lever. in a counterolockwise directionfto ac- -tuatethe levers |00 and I|2 andl thereby to actuate the pusher. S2 and the combinedshearing and clenchingf; member-f 0 8 is derived from., a

- fixed plate Izinto one of a series of peripheral recessesin the disk |82.

To tension the spring |13 `and to cock-the lever |10, there `is provided-a rod |08 whiohzis similar toftherod |32 and also has .at its forwardjend aslot (not shown) .similar to the slotrl3, the slot ofthe rod |88 beingengaged by-a lateral pin (not shown) provided on the-.upper arm. of theflever |10.A Therear end of the rod |83 is `pivotally connected by `a pin `|90 (Fig- 8) ytoa forkmember Q72 corresponding to the fork member and; also mounted for rocking movement about `the Ashaft |38.. A cam |04 on. the'main shaft r|40 engages the tines of the fork member |92..and .on rotation of the main shaft |40thus causes oscillation of the fork member |92 vand reciprocation of the rod |88.. Whentherod |08 is moved Ato its .right-hand position, as viewed in` Fig. rl, the latchy |68 is caused -tol engage the upperl arm of the lever |101so as to holdthe spring |18 loaded and the lever |10V cocked in readiness for the tailpiece |58 -to strike against the tailpiece |58,.thereby tolift the latch |68 and to release the lever |10 to the forceof the loaded. spring |18.

The operation of the machine will now be briey summarized. Consideringthe initial position of themachine parts, as illustratedin Fig. 1,.it will be realized that on initiationof the rotation of themain shafty |40.which may be conventionally Aeffected .by means of atreadle controlled clutch, forward movement, that is movement toward. the left of Fig.. 1,` is imparted to` the rods` |32, |88,. the -forwardends ofthe yrodsmoving .idly with relation .to lthe machine elements `with which they areconnected due to the provisionof. the slots in these forwardl ends. Assoonas the tripping .member |54 strikes against v.the tailpiece.|52'ofthelatch1 |44, the latch |44 israised to release .the bell crank lever S8 to .theifo'rce of the loadedspring V| I4, thereby imparting Va..wire feeding motion to the chuck, as previously described.v`v Towardfthe end ofthe swinging ,movement of the bell cranklever 86 ,ina ,counterclockwise direction, the tailpiece` |56 strikes against the tailpiece V|5.with the result thatthe Ylatch |68 islifted so as to release kthe cocked lever,|10 to the force of, the loaded spring |18and tooperate intimel relation the pusher 92 and the combined 'shearing and clenching "member |08. The configurations of the cam tracks |14, |16 in the rearward arms of the levers |00, I2 are such that the pusher 92 isnrst operated lto deect the already fed' wire strand D into thervertical path of .movement of the shearing member |08 (as shown in Figs; 10 and 11), after which the shearing member I 00 is operated to movein' the direction of wire `feed and to shear off the Yinserted leading end portion of the fed wire strand at a distancey above the work, the cutting edge of the shearing member |00 intersectingthefwire strand at'an acute angle (Fig. 10),v thereby-'providing"a-Vne pointfwhich, due to the continued operation-of thesh'earing Amemberflsdligs; 12to 15),v theniscurled'over. and clenched; intothe zwork` toL producey the completed fastening illustrated in Fig.V 2. The machine parts-now assume lthe positions illustrated in Fig. 3 whence they are returned to their initialI position by the rearward motions of the rods |32,A |88 under the control of the cams |42 andI4 ld. This concludes the machine cycle.y A Having thus described my invention, what I claim asnew and desire to secure by Letters Patent of the United States is: y y

1. In a fastening inserting machine, la 4guiding passage, means for intermittently feeding a strand of fastening material through said passage and ,into a work piece presented to the machine, a combined shearing, curling and clenchingv member movably mounted as to --be operable in a path adjacently parallel to said passage, said member havinga `shearing edge inclined at an acute angle to the direction of the strand as it emerges from out the 4guide passage and having a lowersurface portion facing the work piece and extending.laterally Afrom the shearing edge, means operable upon completion of the feeding movement of the strand into the work piece for bending the strand laterally across the path of said member at an acute angle, and means actuated upon completion of said bending for operating said member in one continuous motion first to shear off the strand at a distance above the work surface while progressively curling the sheared portion of the strand beneath the surface of the member and toward the surface of the work and then to clench the curl of the completely sheared trailing end portion of the strand downwardly and re-entrantly into the work piece.

2. In a fastening inserting machine, a guiding passage, means for intermittently feeding a strand of fastening material through said passage and into a work piece presented to the machine, A a deflector adjacent said surface against which deflector the strand impinges before entering the work with the result that the strand follows a curved path within the work without penetrating entirely through the work, a shearing member movably mounted as to be operable in a path adjacently parallel to said passage, means operable upon completion of the feeding movement of the strand into the work piece to engage the strand transversely4 between said delector and passage and to bend the strand laterally across the path of said member so that the strand may be intersected by the shearing member, and means actuated upon completion of said bending for operating said member to shear off the strand at a distance above the work surface.

3. In a fastening inserting machine, a guiding passage, means for intermittently feeding a strand of fastening material throughsaid passage and into a work piece presented to the machine, a deflector adjacent said surfaceagainst which deector the strand impinges before entering the work with the result that the strand follows a curved path within the work without penetrating entirely through the work, a combined shearing, curling and clenching member movably mounted as to be operable in a path adjacently parallel to said passage, said member having a shearing edge inclined at an acute angle to the direction of the strand as it emerges from out the guide passage and having a lower surface portion facing the work piece and extending laterally from the shearing edge, means operable upon completionof the feeding movement of the strand into the work piece to engage the l0; strand transverselybetween said deiiector and passage and to bend the strand laterally across the path of'saidmember so that the strand may beqintersected bythe shearing,member at an acute angle, yandmeans actuated upon completion of said` bending for operating said member in one continuous motion first to shear yoff the strand at ;a distance above Athe work surface while progressively curling Vthesheared portions of the strand beneath the surface of the member and toward the surface` of the work and then to clench the curl of thecompletely. sheared trailing `end portion of the strand downwardly andre-entrantly into the work piece. v f Y v 4. In a fastening inserting machine, a guiding passage, means for intermittently feeding a strandof fastening material through said passage and into awork piece presented tothe machine, means associated with `said passage for curving the strand in one direction, a deiiector adjacent said work surface against which deflector the strand impinges vas tol bend the4 strand in the opposite direction to cause the strand to enter the work in a curved path and to follow a curved path within the work without penetrating its full thickness, a shearing member movably mounted as to be operable in a path adjacently parallel to said passage, means operable upon completion of the feeding movement of the strand into the work piece to engage the strand transversely between said deflector and passage and to bend the strand laterally across the path of said member so that the strand may be intersected by the shearing member, and means actuated upon completion of said bending for operating said member to shear oi the strand at a "distance above the work surface.

i piece for bending the strand laterally across the path of said member so that the strand may be intersected by the shearing member, and means actuated upon completion of said bending for operating said member to shear off the bent portion of the strand at a distance above the work surface.

6. In a fastening inserting machine, a strand feeding clamp operated in sequence to enga-ge a strand, advance the strand through the machine and insert its leading end portion into a work piece presented to the machine, means for actuating the clamp, a pivotally movable combined shearing, curling and clenching member adjacent the work surface, a guiding passage extending from the feeding clamp to the member for directing the strand as it is being fed towards the work through a plane contiguously adjacent to the path of said member, a deector against which the strand is progressively directed by said passage during the feeding movement to impart a curve to the leading end portion of the strand directed downwardly toward the work with the result that the strand follows a curved path within the work without penetrating entirely through the work, a pusher element arranged for movement upon completion of the strand feeding for contacting and bending said end portion out of the plane of its normal path of movement and into the path of movement of the combined 1'11- Y shearing, `Fcu'rling vrand clenching member, said memberhavinga-shearing -edgeand a `lou/'enfemface portion facingA the Work piece and extending laterally from the lshearingedge,"and-means actuated upon bending of the end-*portionof the strand'for 'operating saidfmember to` cause said vedgel-to engage-the-bentstrand portion at-1 an acute 'angle to kprogressively 1severthe:strand Whilefsimultaneously directing the Vnist-severed portions tobeneath the surface -portion ofthe member so thatcontinued operative movement of the membercurls' the completely severed end downward toward the surface of @the workand then clenches the endinto the-Work piece.

7J-Inf a fastening inserting mach-ine, 4a Ystrand guiding passagef means -for intermi'ttentlyi feeding-a strand of lfastening material throughk sai-'d passage and into awork piece Ipres'ented* tot-the machine, a movable strand shearing .member mounted as to -be operable in'al pathradjacen-tly parallel to said-guidingpassage, a strandpusher operable upon completion of `the feeding vmove-- ment ofil theV strand .tol engagef' thefstrandztransverselyasfthe strandv emergesffrom--said--passage and to'push it lateral-1yacross the path of said member; means `for' operating the feeding `means to insert the leadingend of the strand into the Work piece, and'fmeans'actuated 'upon completion of the feeding movement 4of the strand for operating Vr'st'- the strand pusher and thenwsaid member to shear o'- the v'strand at a distance above the work surface. y

CUTLER D- KNOWLTON.

REFERENCES CITED UNITED STATES vIATIEINTS Number Name Date 1,174,937 Merrick Mar. '7, 1916 .1,804,397 Brogan May 12, 1931 

